BoilerTroubleshooting2026-02-26
Boiler Pump Not Working: Signs and Fixes
A failed circulation pump causes no heat, overheating or noise — and usually needs replacing.
The circulation pump moves hot water through your system; when it fails, heating suffers.
Signs of failure
No heat despite the boiler firing, overheating lockouts, or pump noise and vibration indicate a failing or seized pump.
The fix
A technician confirms the fault and replaces the pump, then bleeds and tests the system.
Key takeaways
- No heat but boiler fires = check pump
- Overheating can mean a weak pump
- Noise/vibration signal wear
- Usually replaced, not repaired
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